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COMPARING THE EFFECT OF FUNGICIDE THIABENDAZOLE AND TRICHODERMA IN FUSARIUM AND MACROPHOMINA IN SOYBEAN | ||
| The Iraqi Journal of Agricultural Science | ||
| Article 1, Volume 41, Issue 1, 2010, Pages 70-78 | ||
| Authors | ||
| Hadi M. Abood; Majda H. Mehdi; Rakib A. Alani | ||
| Abstract | ||
| This experiment was conducted to determine the compatibility of using the fungicide Thiabendazole with the biocontrol agent Trichoderma to control Fusarium solanl and Macrophomlna phuseolina causing- seed and root rot on soybean. Results showed that the two fungi, isolated from root and soil frequently cultivated by soybean, had the capacity to cause seed rot, seedling death, wilting, and root rot on soybean. The percentage of seed germination in' treatments of F. solani, M phaseolina, and the interaction between them were found to be, 36.6, 46.6, and 50 % respectively compared to 83.33% for the control treatment. It has been found that Thiabendazole showed II significant effect on the rate of the radial growth of the two fungi and on the dry weight of their biomass on cultural medium. The percentages of inhibition for F. solani was 27.6, 41.5,55.5,87.1, 100 % at concentrations 0.1, 0.2,0.4, 0.8, 1.6 mg/L of Thiabendazole respectively, 24.9, 40.0, 54.8, 85.5, 99.6 % for M. phaseolina at the above concentrations. The dry weights of the biomass for F. solani were 0.13, 0.04, 0.03, 0.04, 0.00 g for the above concentrations of Thiabendazole compared to 0.17 g for the control, 0.14, 0.11, 0.07, 0.03, 0.00 g respectively for M. phaseolina compared to 0.23 g for the control. No toxic effect of Thiabendazole on Trichoderma was observed. Thiabendazole was found to be effictive in suppressing the growth of both pathogens and increased the percentage of seed germination and decreased the desease severity on foliage and root system. The combination of Thiabendaznle with Trichoderma was found to be active to increase percentage of seed germination and decrease the disease severity on both of foliage and root system of soybeans. | ||
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